Okay my car has problems ideling right when i first start it it seems okay, maybe a lil rough but okay. Then out of no where it revs up any where from a grand and a half to 2 grand. Eventually it will come back down but then it goes right back up. I recently replaced the IAC and test the TPS (seemed to be fine, there were no dead spots in it). Also When it is cold outside it does not want to stay running. It just falls on its face when its cold out, but if you hold the throttle down and hold it for awhile then back it down it will be fine but still have the same idle problem as stated above. Please help My dad a nd I are completely in the dark here!!!